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Volcanic Eruption Update (July 6, 2018): Sierra Negra Volcano, Isabela Island

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Diego Zapata

Rosa Mena

Sandy Lara

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Diego Zapata

Rosa Mena

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Our last eruption report that we published the previous week mentioned that Sierra Negra Volcano showed various fissures that were continuously releasing lava and other volcanic products. As of July 1, the intensity of the eruption had slowed down in many areas and no eruption evidence was readily visible. The local civil defense authorities and National Park Service also assessed the site and rolled back their original decree of not allowing visitors in the nearby overlook point of Sierra Negra Volcano. Visitors are now allowed to reach the rim of the volcano at the site called “El Cura,” and can walk along the overlook point #2. Additionally, the 50+ residents of the highlands that were evacuated just a few days ago have returned to their respective homes and farms.

Sierra Negra Volcano Eruption In July 2018
Pictures Courtesy Of Mr. Benjamín Ayala, Galapagos Naturalist Guide.

Ongoing Volcanic Activity: Spectacular Views Await!

Lately, as of Thursday, July 5th, a new swarm of tremors has been detected under the caldera floor, with one seismic event measured at 4.9 on the Richter scale. Geologists understand that new molten rock has internally entered the volcano’s magma chamber and that fluids are now moving underneath the volcano. Therefore, the interpretation of this process is that this particular eruptive event has not ended, and that, although fluid lava may not be visible, the volcano, at least internally, continues its eruptive process. Our itineraries have not been modified, and whenever we are exploring the western side of the archipelago, as is part of our regular programmes, our Expedition Leaders and Captains will assess the local conditions in order to launch a nocturnal voyage along the shoreline for some of the best views of the eruption. In fact, this very evening, we will be passing alongside this exact region of the island – hopefully we’ll be fortunate enough to see something spectacular! And don’t worry: more detailed reports, pictures and videos will be shared as they become available!

None of these tectonic-volcanic events are to be associated with similar events like those of the mainland or other volcanic islands. The Galapagos Islands are on top of the Galapagos Hot Spot which is a separate plume.

Javier Garcia

Eduardo Silva

Carolina Escobar

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Javier Garcia

Eduardo Silva

Carolina Escobar

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Updated:November 21, 2023

Published:July 6, 2018

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